According to some research I read recently, most adults prefer the colour blue.
This is why it is a popular colour for logo design and company advertising.
Have a look round and put this to the test. Think Facebook for instance.
Blue is considered to signify calmness and strength, whereas the colour red signifies danger (in nature), and excitement in advertising. Think of Ferrari cars, and Coca Cola. Both use red, and both are promoting fun and excitement.